下面小编就为大家分享一篇asp.net使用H5新特性实现异步上传的示例，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧
###index.html
<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <script src="https://www.jb51.net/Script/jquery-1.10.2.min.js"></script> <script src="https://www.jb51.net/Script/index.js"></script> <title></title> <script type="text/javascript"> $(function(){ $("#ajaxFileUpload").click(function () { formDataUpload(); }); }); </script> </head> <body> <input type="file" multiple="multiple" mame="FileToUpload" /> <input type="button" value="上传"/> <input type="text" size="10"/> </body> </html>
###index.js
function formDataUpload() { //这里可以一次性选中多个文件 var fileUpload = document.getElementById("FileToUpload").files; if (fileUpload.length == 0) { alert("请选中文件再上传"); return; } //html5新特性 var formdata = new FormData(); //添加上传数据 for (var i = 0; i < fileUpload.length;i++){ formdata.append('files', fileUpload[i]); } //使用javascript的原生ajax var xmlHttp = new XMLHttpRequest(); xmlHttp.open("post", 'Handler.ashx?method=formDataUpload'); xmlHttp.onreadystatechange = function () { if (xmlHttp.readyState == 4 && xmlHttp.status == 200) { alert("上传成功"); } } xmlHttp.send(formdata); }
###handler.ashx
<%@ WebHandler Language="C#" %> using System; using System.Web; public class Handler : IHttpHandler { public void ProcessRequest (HttpContext context) { formDataUpload(context); } public static void formDataUpload(HttpContext context) { //获取到客户端提交的文件 HttpFileCollection files = context.Request.Files; string msg = string.Empty; string error = string.Empty; int fileM = 0; if (files.Count > 0) { for (int i = 0; i < files.Count; i++) { ; String path = @"D:\"+files[i].FileName; files[i].SaveAs(path); fileM += files[i].ContentLength; } msg = "上传成功，文件总大小:" + fileM; string res = "{error :'" + error + "',msg:'" + msg + "'}"; context.Response.Write(res); context.Response.End(); } } public bool IsReusable { get { return false; } } }
以上这篇asp.net使用H5新特性实现异步上传的示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。
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